Replacing Teflon sealing ring

→ Teflon sealing rings must always be replaced after removal and before refitting injectors.

→ Do not replace Teflon sealing rings until just before fitting the injector.

→ Install injector immediately after replacing the Teflon sealing ring.

Information 

• The pictures shown in this document may differ from the original.

Information 

The tool numbers refer to the individual parts of the tools in the repair kit T10133  and the supplement set T10133/11-15  (unless indicated otherwise).

Installation position of Teflon sealing ring: 

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Remove high-pressure fuel injector.
2. Clean fuel injector carefully using a plastic brush (or cloth) and acetone or solvent naphtha. Grip Teflon sealing ring gently using pointed-nose pliers and pull it off carefully -1-  . Do not scratch the valve body.

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

3. Also clean sealing ring groove in the sealing ring area. Remove any deposits (coking).
4. Fit new sealing ring -2-  on mounting cone no. 5 -1-  . Using assembly sleeve no. 6 -3-  (knurling facing the sealing ring), push sealing ring gently as far as it will go onto mounting cone no. 5.

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

5. Turn assembly sleeve no. 6 -3-  around (knurled side now no longer facing sealing ring), and push sealing ring -2-  onto the end of mounting cone no. 5 -1-  .

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

6. Place mounting cone no. 5 with sealing ring onto the fuel injector from the front -1-  . Push sealing ring further onto the fuel injector using assembly sleeve no. 6 -2-  .

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   The sealing ring is not yet seated in its groove! 

7. Remove assembly sleeve no. 6 and mounting cone no. 5. Push sealing ring into the ring groove using assembly sleeve no. 6.

   Calibration (shaping) of Teflon sealing ring: 

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   1. 7.1. Press calibrating sleeve no. 8 -1-  as far as it will go over the sealing ring. Leave calibrating sleeve no. 8 → (Time: 1 Minute  ) on the sealing ring. If calibrating sleeve no. 8 does not fit immediately because the Teflon sealing ring has expanded, use calibrating sleeve no. 7 as described in the previous step.

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   2. 7.2. Pull off calibrating sleeve no. 8 again.

   The Teflon sealing ring now has the correct installation dimension  .

8. The injector should now be installed immediately, as the Teflon sealing ring will soon start to swell (prevents leaks when installed). Otherwise leave calibrating sleeve no. 8 -1-  on the Teflon sealing ring for longer or fit calibration cap (transport sleeve for new injectors) -2-  .